Dental jig-polisher.



W, L. HUNTER.

DENTAL JIG POLISHER.

APPLICATlON FILED JUNE 1, I9I4.

1,151,361, Patented Aug. 24,1915.

WITNESSES: i/V l/EIVTOI? a g/KW M Lee Aka/77a A TTORNE Y COLUMBIAPLANOGRAPH (JO-WASHINGTON. D. c.

w. LEE HUNTER, or snA'rrLn, WASHINGTON.

meant ne-PomsnEn;

ft Specification of Letters Patent Patented Aug. 24, 1915.

Application filed June 1, 1914;. Serial No. 842,066.

To all whom it may concern 7 Be it known that I, IV. LEE HUNTER, citizenof the United States, residing at Seattle, in the county of King andState of lV-ashington, have invented a certain new and usefulImprovement in Dental Jig- Polishers, of which the following is aspecilication.

My invention relates to improvements in dental jig-polishers adapted tobe employed by dentists in the operation of polishing and cleaning teethin the treatment of pyorrhea and the object of my improvement is toprovide a polisher which shall embody simple and ei'licient mechanismfor converting the rotary motion of a shaft into a reciprocatory motionat right angles to the axis of said shaft which mechanism shall be soconstructed that all of the working parts thereof shall be completelyinclosed whereby such working parts shall be protected from dirt anddust and be effectively prevented from engaging with exterior objects.

I accomplish this object by devices illustrated in the accompanyingdrawings in which- Figure 1 is a longitudinal sectional view of adentists jig-polisher embodying my invention; Figs. 2 and 3 are views inperspective of details of the same; and Fig. 4 is a view in sideelevation of a detail of the Same.

Referring to the drawings throughout which like reference numeralsindicate like parts, 7 is a tubular casing that serves as a housing forthe drive shaft 8 of my jigpolisher, such casing 7 being provided withan enlarged upper end 9 that is threaded to receive a bearing piece 10and is narrowed at a suitable point to provide a shoulder 11 with whichan integral collar 12 that is formed on the shaft 8 may engage toprevent such shaft from moving endwise such collar 12 also being adaptedto engage with the bearing piece 10 where such bearing piece is screwedinto the casing 7 as more clearly shown in Fig. 1, and the casing 7 isfurther provided at its other end with a reduced bearing portion 13 andwith a hollow internally threaded right angular projection 14 into whicha tip 15 is adapted to be screwed.

A reciprocatory plunger 16, more clearly shown in Fig. 3, has one endprovided with i an enlarged head 17, within the periphery of which headis disposed an outwardly proecting pin 18, and the other end is provldedwith a hole 19, that is adapted to re ceive and hold a dental instrument20, and such plunger 16 is disposed within the right angular projection14: of the casing 7 and is adapted to be pressed inwardly by acompression spring 21 to cause the head 17 to engage with the side of aneccentric pin like portion 22 that is provided on the end of the shaft 8whereby the plunger 16 will be moved outwardly by the pin 22 andinwardly by the spring 21 on each rotation of the shaft 8, the spring 21engaging with the inside surface of the head 17 and with a shoulder 23in the tip 15 to press the outside surface of the head 17 against thepin 22 at all times and the pin 18 on the periphery of the head 17 movesin a slot 24 that is provided in the cap 15, as the plunger 16reciprocates.

The outer end of the shaft 8 is provided with any suitable mechanism toadapt it to be connected with a suitable dental driving mechanism, notshown, and is positioned within a tubular housing member 25 that isadapted to be screwed on the bearing member 10, as more clearly shown inFig. 1.

The shaft 8 is rotated to cause the plunger 16 to be reciprocated atright angles to the axis of the shaft 8 whereby instruments may beeasily inserted and used in certain parts of a persons mouth that arenot easily accessible to a straight instrument.

Manifestly changes in the form of the various details embodied in myjig-polisher may be resorted to without departing from the spirit of myinvention or sacrificing any of its advantages.

WVhat I claim is In a dental jig polisher, the combination with atubular easing having an extension on one end thereof, disposed atright-angles thereto, of a shaft adapted to rotate within said casing,an eccentric-pin provided on one end of said shaft adjacent to saidextension with one side in alinement with said shaft, a tool holdingplunger within said extension, a tip threaded into said extension andhaving a slot in one side opening at the bottom of the tip, anenlargement on the inner end of said plunger bearing on the eccentricpin, a shoulder formed on the inner face of the tip adjacent the outerend i In Witness whereof, I hereunto subscribe thereof, a radial pincarried by the plunger my name this fifteenth day of May A. D..enlargement and adapted to travel in said 191 i,

I tip slot, and a coil spring surrounding the k W. LEE HUNTER.

5 plunger engaging atone end the tip shouli Witnesses:

der and at the other end the plunger en- F. B. MATHENY, largement. v O.JOHNSON.

Copies of this patent may be obtained for five cents eac h, byaddressing the Commissioner of Patents 1 -Wash ington, ID. 0, g

